# Basic SWR measurement
---
Basic SWR measurement with a RigExpert Zero-II and an arduino nano.
### *Table of contents:*

* [Description](#description)<br>
* [Setup](#setup)<br>
* [References](#references)<br>
* [License](#license)<br>
* [Author](#author)<br>

---
## Description
---
This program is an adaption of the "BasicMeasure.ino" which was in the
"RigExpertZeroII_UART/examples/BasicMeasure/" directory of the "RigExpertZeroII_UART.zip" file
on RigExpert's website.

For testing purposes the frequency in the program is fixed at 14Mhz and the antenna tuned with a tuner
in order to show the different SWR values.

<img src="serial_monitor.png" width="600">

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## Setup
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Please see the *Setup* and *Gotchas* section of the main [README](../../README.md).

***Connections:***

|ARDUINO NANO -> | ZEROII   |
|----------------|-----------
|PIN 4 (RX)      |  TX      |
|PIN 7 (TX)      |  RX      |
|PIN 2           |  RST     |
|PIN X (+5V)     |  POWER + |
|PIN X (GND)     |  POWER - |

<img src="overview.jpg" width="800"><br>
Overview of the setup.

<img src="zeroII.jpg" width="400"><br>
Closeup of the Zero-II.

<img src="nano.jpg" width="400"><br>
Closeup of the arduino nano board.


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## References
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* https://rigexpert.com/files/libraries/RigExpertZeroII_UART/RigExpertZeroII_UART.zip
* https://rigexpert.com/files/manuals/zeroII/ZEROII_user_manual.pdf
* https://rigexpert.com/news/zero-ii-the-tiny-and-powerful-analyzer/
* https://www.dxengineering.com/parts/reu-zero-ii/reviews
* https://wb9raa.com/AAZ-II/
* https://github.com/gerner/zeroii-analyzer
* https://www.youtube.com/watch?v=k0yOb7h5t74

## License
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* GNU GENERAL PUBLIC LICENSE Version 3

## Author:
---
* kaulquappe (https://notabug.org/kaulquappe/)
